Sum-rate maximization for two-way MIMO amplify-and-forward relaying systems

Kyoung Jae Lee, Kwang Won Lee, Hakjea Sung, Inkyu Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

57 Citations (Scopus)

Abstract

This paper considers two-way relaying systems with a multiple-input multiple-output (MIMO) relay between two MIMO terminal nodes. The two-way relaying protocol can enhance the spectral efficiency compared with the one-way protocol by compensating the loss from half-duplex signaling. In this paper, we propose an iterative scheme to find a relay weighting matrix maximizing the sum-rate for two-way relay channels. Due to the non-convexity of the given problem, the proposed scheme iteratively identifies a local optimal solution by deriving the gradient of the sum-rate and applying the gradient descent algorithm. Simulation results show that the proposed iterative scheme with provable convergence achieves a near-optimal sum-rate for the two-way MIMO relay channels. Also, we show that the proposed scheme with a few iterations still outperforms the conventional schemes.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
DOIs
Publication statusPublished - 2009 Oct 12
EventVTC Spring 2009 - IEEE 69th Vehicular Technology Conference - Barcelona, Spain
Duration: 2009 Apr 262009 Apr 29

Other

OtherVTC Spring 2009 - IEEE 69th Vehicular Technology Conference
CountrySpain
CityBarcelona
Period09/4/2609/4/29

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

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    Lee, K. J., Lee, K. W., Sung, H., & Lee, I. (2009). Sum-rate maximization for two-way MIMO amplify-and-forward relaying systems. In IEEE Vehicular Technology Conference [5073868] https://doi.org/10.1109/VETECS.2009.5073868